Internal-combustion engine.



G. Y. KNIGHT. INTERNAL ooMBusTIoN ENGINE.

` AIPLIOATION FILED JUNE 4, 1906.

Patented Mar. 24, 1914.

w M w STP f @hFltClEt Y; KNIGHT, or anx ranas, rLLINoIs, Assmann-To KNIGHT Ann xrnnounwn rnrnrr'rs comm, or cmcneo, ILLINoIs, a conronnrron or nar-.awash I mrnnr'rnneoimusrrolv ENGINE.

imacat. )sneeuwenefwtersratent Patenten Mar. sa, rain.

f Application med :une 4,1906. smauvaaaaoea l T allfwlwm t may gemacht: piston is at the top dead center. At or about 55 Be it known that I, CHARLES Y. K mur, the-time the working piston starts down- -a citizen of the United States, formerly re ward, the inner sleeve also starts downward. l sidin at Oak Parkyin the county of Cook VW hen the piston has reached within the d'e-E and tate of Illinois, and now residing at sired distance from the end of the power Coventry, England, have invented certain stroke, it uncovers the lower exhaust port 6o new and useful Improvements in Internalin the sleeve which is then in registervwith Combustion Engines, of which thefollowthe lower exhaust port in' thecylinder, at

in is a full-clean and exact specification. which time the sleeve valves will'have been Y 'his 'invention will be set forth in the brought by their eccentrics to such position subjoined description and accompanying that the ports therein will also register with 65 drawings, and more articularly pointed out the exhaust ports in the cylinder at the top, .in the claimsappen ed to saidspecilicatiorrY permitting the burned gases to 'escape at In the saidA drawingsFigure 1 isa di'abothtop and bottom of the cylinder as the grammatic illustration of an .explosion enpiston returns upon the scavenging stroke.-

. gine provided with a lubricator embodying The exhaust passages in this `form are closed 70 this invention. And Fig. 2 is adetailview through the changing of position with reof apart ofthe mechanism for regulating lation to each other of the two sleeves, the the 'supplyo lubrlcant. Iupper lip of the port 'in the outer sleeve V My invention relates to an explosive enlapping with the lower lip of the port in the ,gine of unusual form and to means for lubri- -mner s eeve to seal the combustion chamber "5 catinglit. In this particular type of engine, against thereturn of spent gases from the the valving is accomplished by the combined exhaust port in the cylinder. As the piston ation' of the piston 1,` and two relatively descends upon its suction stroke, the sleeve- 1 reciprocating sleeves 2', 3, arranged within r valves are further displaced with relation 5, 6, respectively, constituting a terminal exthe' intake ports to (pen, vhitherto closed haust-,fwhich at the proper time communithrough the lapping o the lips of ports in. cate 'with an exhaust port 7 in the cylinder one sleeve-valve withv the lips of ports i the main cylinder 4, and provided with ports to eachother by the eccentrics, which causes '4 and this -in'turn,may of course be conthe other. When the suction stroke is com-4y 11 4in the .cylinder/l at'the proper time, auxthe outerend ofthe inner sleeve with -the nected with an 'exhaust pipe 8, as usual. pleted, the V,sleeve-valves move u ward over' 85 fllhesefsleeves 2,3, may also be providedwitl'r the vlixed head `and the sealing o the explosuitable intake ports 9, 10, which come into sion chamber is accomplished through the register with each other and with an intake lapplngof the intake and exhaust ports in ,ililf exlniust` portslZ, 13, A14:, being pro fixed head; 90

when thi engine is used as a fonri T hcbase ofthe engine 1s in the form 'of cycle engine. 1 an inclosedfcrank case 15, as islusual withj-,I-n-.theexemplification setforth Ahereinthe inany. `forms of explosion engines, and -inr f '40 .Y sleevewalves are telesco ed with each other thefcranlr case, at the most advaz'xtageous in a fixed cylinder an vover a piston and sitioii for discharging upon the partsto 95 -xejhead and areI actuated by eccentrica-g .jlubricated, is arranged Yan atomizer, or

whchi'evolve once to two revolutions ofthe any other suitable spraying device,consist-` mainrcrank shaft, `the eccentricucontrolling ling ofa`n air nozzle lvand an oilnozzle 1'?" T 'one sleevel valveleading thatactuatingthe."counected, respectively, with a valve housother by-an numberofdegrees (in-this case. -ingl''and a tank orzsource of lubricant 19, 100,.r

45) -suitab for causing the portsthcreixr so tliatjwhez'xv pressure is, admitted4 to the to move inan'd out-of;l register 'and in and` V.inutile-1)the `lubricant will be thrown in 'a l out of lapped relation with eachother spray over the parts withinA the the lixedhead as for the fourLcycl ,crankv case, rising also into engagement with stroke.; 'f l thefpiston,.theinnerwalls of the cylinder," 4105 Y withthe'explosion stroke, lthe andthe wearngsurfaces of the sleeves 2, 3.

inner s eeve..valve isapproximately at This pressure within the' nozzle 16 may be end of its outertravel when lthe working', lxiiaijilvrr,from any suitable source, but piet erably from the exhaust pipe of the engine, aswill be presently explained, land from whatever source it be taken, it will create more or less pressure within the crank case, and this is taken advantage of for raising the lubricant to the upper end of the cylinder, where it is discharged through any suitable passage or connection 20, into a space 21 which is left between the head of the cylinder and the upper ends of the sleeves, and in which space more or less suction is created by the reciprocating movement of thesleeves, which also tends vto lift the lubricant. This brings the lubricant into contact with the sleeves at their upper ends, and insures their lubrication at a much higher elevation than could be accomplished to suit the requirements, an

. cutting away on by lubricatin from the lower ends alone, and it also a ords a source from which to draw this fog ormist of lubricant for oiling the bearings of the machine at distant points. As an example, the space or. chamer 21 is shown as connected by a. pipe 22 to a bearing 23, in which the shaft 24 of the valve -operating cam, to be presently described, is 'journaled, but other pi s or connections, such as pipe 25,1nay aso be led from the chamber 21 toother partsof' the machine, the lubricant being carrieltoI its destination through these pipes or'tubes by t e pressure created in theichamber 21 by t e combined action of the sleeves and the atomizer, which is alsoassisted'or augmented by the tanning motion of the piston.'

lubricant disbe regulated appropriate means maybe provided forv intermittently, and at longer or shorter periods as may Abe required, vinterrupting communication between the nozzle 16 and the exhaustj pipe 8, or other source of the 'fluid under pressure. For thispurpose, the valve housing 18 is divided into two .compartments 26, 27, by a valve seat 28 and valvel 29,-the compartment .Z being connected bya pipe 30 to exhaust pipe 8, and compartment 26y by a pipe 31 to nozzle closed by a spring 32 on a valve-stem 33, whose upper end has an anti-friction roller 34, arranged to be engaged by a cam 35, which has the form that would result from a taper or angle one side of a cylinder. This cam is rotated by the camsshaft 24",'having a worm wheel 36 engaging 4a worm 37, connected in any suit-- bleway with the operating mechanism of the engine, as, for-example, by ashaft 38 having bevel-gear connection 39 with a shaft 4Q, which drives the sleeve-operating Inorder that the supply of charged by the atomizer may g eccentricsfltf? and-derives motion from @crank shaftlll' through the intermediary of soi that'at each revoluthel valve 29 will be less length offtime, ac-

suitable gears 42, 43,." tion of the cam 35 opened a greater or cam.

What Iclaim is:

j 'i 1. In an apparatusof the character-described the combination oi an a. main cylinder or casing, a crank case" on which said cylinder is mounted and into which it opens,

for controlling the ports of the engine sliding axially within said-,main cylinder, a working pistonreciprocating in the inner one of said sleeve valves, a head fixed to the main cylinder-and` projecting into the inner sleeve valve :wherebyva' chamber is created at the :ends ofsaid sleeve'fvalves removed from the crank case, .the ."outerone of the sleeve valvesbeing in working relationto the main cylinder, and Vmeans operatively con` nectedwith the .piston for' reciprocating said sleeve valves in said 'chamber whereby suction and compression 'ternately as the pistonalternately creates suction and compression in the crank case,

16. The valve-29 is-held and means. for supplyin the crank case with lubricantA whereby suc A'lubricant will be caused to contact with the end faces of the sleeve valves and `t o` be distributed between such valves lengthwise thereof. 2. Inan apparatus of the scribed vthe combination with an internal combustion engine' having intake' and exhaust portsand embodying a crank case, a main cylinder opening intothevcr'ank case and having its outer end closed, a head fixed against movement-,relatively tothe said main cylinder and; vrojecti thereint'o and spaced from the wal s thereo ,two telescoped sleeve valves for controlling said ports' telescoped with said vheadand 0' n at bothends and communicating with t e crank case at one end and with the space between said head and main cylinder at the other end, a work in piston reciprocating inthe inner vone of said sleeve valves relatively thereto, the outer one of said sleeve valves being ar# ranged inf operative relation tothe inner of said sleeve valves for-controlling 4the parts aforesaid, andfmeans operatively connecting -t-he piston with the sleeve valves for recip` rocating them, ofmeans for supplying lubricant to the crank case whereby the falternate rareaction and compression of the air in the space between said head and. main to the lengthof the -twor telescoped sleeve' valvesV y internal combustion engine having ports and embodying is created therein al- 105 character de.

lubricant,

y between lthem as. they reciprocate.

cylinderand in thc crank case cause;

between and lengthwise of ativel'y` movable Fior -'controlling the said in the.

ports, afworking piston Freciprocatin inner. one of 'said sleeve valvesire atlvely thereto, the outer one ofsaid sleeve valvesv being arranged in working lit with lthe face .Y operatively s ofv thek main cylinder, andmea.ns connecting the sleeve 'valves with1 .the piston for reciprocating them, oflmeans for supplying lubricant to thecrank case .whereby suoli lubricant will bezsupplied'to the ends of the sleeve valves .and distributed lengthwise the combination of 'an means for supplying the samewith means whereby the atomizer may be supplied vwith fluid underlpressure, a valve for regulating Ythe pressure. supplied to the atomizer, vac :aiiif-for openings'ai'd valve, andzmeansor rotating said ca f5.5; In a lubricatin, .the combination with 4. Iiilaf lubricator, atomizer,

y anatomizenjmeans forY supplying the same With lubricant, means `omizer .with `iiuid under 35 omizer,a cam for openingthe valve, having regulating the pressure supplied to the-at` an active face" varying'. in extent longitudil nally of'ijtsfaxia'me'ans V for rotating the cam,

'I an engine AhavingY an. enliaust pass ommenmeans .connecting the atoirnzer with A" a source of lubricant and means connecting i5 t said supply',fmeans for 'openinggitlgesvaive .and mean'sfor adjusting it lengthwise of its ,.40

.6; -a lubricaton Ithe combination. with an. at-

heetomizer with said In a\ lubrieator, an Yengine having an .exhaust passage; l'

atomizcr and said supplying. the ,atoniizer4 with lubricant.

an enginegof an atomizer,

supplying 'the atomizervwith fluid` Iunder pressure, andmeans for L(muitrollii'igthe lat-'1 f ter suppl o eratively `connected ywith thev engine, w rebythe supplyy willibe rou-- 'portioii'fto the'- speed of-.thesengine .j In a. lubricator,'` the corr'xbinatio Vith 'ing-fthe'iitnni'y efriwitlrlubricant, ?'nieans for supplying thefatoiniaer l with duid junder pressure," 'af valvefor `controlling the latter intermittently,

engine having intake and Vex-` a't its inner end,

for supplying the atpressure, a valve for a' he'ad fixed to fthe thereof, two telescope the combination with valves telescoped with exhaust passage, of an' 4 atomizer connected .with said passage, means A for controlling', the connection between-` Ythe passage, and means foiv sleeve, valves,

y valves' being' arran 1' 8. in .a flubric'atonzthe combination with' means for supply-1. ing-theiatomi'zer with lubricant, means forv m. {tlivalvesaro suplie'd'with such lubricant, theisaxnelbeing istribi'ited between saidv valvesias `they reciprocate. -an.enginc,; ofana-tomizer,meansiorsiipply f and means connecting the last said means with the engine whereby the discharge of the atoniizer will be in pro-v portion to the speed of the engine.

lO. In alubricator, the combination ofy an engine having an exhaust passage, an atomi-zerarranged to discharge upon the parts tol be: lubricated, and means connecting the atomizer with theexhaust passage whereby the .discharge from the atomizer will -bein proportion Vto'ithe speed of the engijginef? lll. lIn a lubricator, atomizer, means for su with lubricant, means or supplying the atomizer with Huid under pressure, a valve for controlling the supply r'of Huid under pressure, means for operating the valve, and 'means' for varying themovement of the val-vefor regulating the said supply of fluid under ressure. y Y

1:2. he combination with the parts of an apparatus to be oiled of an oiling device separated from said parts by an intervening space, and means for` operating said; oiling device intimed relation to the movement of the parts to be oiled to throw a definite and predetermined amount of oil in the form of a jet intermittently upon said parts-at pre-` determinedqtimes,

13. The combination with an open ended cylinder and a pistonfworking therein, of an oihng devicevactingintermittentlv to throw ajet of oil into theopen end of the cylinder, and means `:tor d i timed relationto ,the movement' fofthe pis 14, In anlap'paratuso thegcharactcrdescribed, the combination with an internal combustion engine having intake yand exhaust portsand embodying a crank case, a main cylinder closed at' its outer end and openinginto the crank case at its inner end,

said cylinder and projecting thereinto and paced from the walls reciprocating sleeve said head` in ysaid .main 'c linder and relatively movable for control ing the said ports, a workin pistoil reciprocating in the inner one-'o said Y the outer one-of said sleeve ged in workingft with tl1e.',i"a.ce of the main cylinder, both Aof said sleeve valvesv being open` at their inner ends to v`the crank case,

and-means 'operatively `connecting the. sleeve valves ywith .thepiston ,rireciprocating them, of

.ineens for supplythe? crank casel `with 'lubricant t whereby the combination of an plyng the sainev operating the oilingfdevioe in iso L 1.5.v Inan apparatus ofthe'character dev, scribed theA Ycon'ibinati'on' withV an vinternal w comhustionifen negliavingaintake andr ex-Y haust 'erts an embodyin Aa main-c linder a bei projecting intein. @mit ieo spaced from` the walls thereocfpand fixed against movement with relation Athereto, a working piston opposed to said'headand reciprocating with relation thereto, two Ateleoped sleeve valves surrounding saidhead and piston in the'space between the head and cylinder, the outer one oisaid sleevevalves ciprocating fixed head closing the other .end o' the main thereinto and spaced cylinder and ro]ectin from the walls thereo a working piston rein said cylinder with relation to said head, a sleeve valvetelescoped with the head and forming thebarrel for the piston and in which barrel the piston reciprocates, a second sleeve valve telescoped over the first said sleeve valve and arranged in working relation to the first sleeve valve or controllin the said ports therein, said sleeve valves eing as long as the stroke of the piston and openin at their inner ends into the crank case, an means operatively connecting the sleeve valves with the pistonfor reciprocatinglthem in the space between the head and the cylinder and atl times in opposite directions, of means for supplying lubricant to the space between said head and sleeve valves at the outer ends of the latter movable for controllmg saidports, a pistonv valvestoward' and whereby said lubricant is caused to work between the contiguous faces of the sleeve valves.

17. In an apparatus of the character de scribed the combination of the base or crank case of an internal combustion engine, a fixed cylinder open at its slower end and mounted on said crank case and having in-` take `and exhaust ports, two telescoped sleeve valves open Vat both ends and telescoped with said cylinder and relatively working in the. inner one of f said sleeve from said crank case whereby 'a tanning action of the air is created in the crank case resulting'in inward and outward draft 'between said sleeveA valves, means connectingA the piston with said sleeve valves for reciprocating them in 'opposite directions, and means for supplying lubricant into theY crank case adjacent to the contiguous faces of the sleeve valves.`

18. In an ap aratus of the character described the com ination of the base or crank case of an internal fixed cylinder open at its lower or inner end scribed, the combination with' an internal ,main cylinder cylinder and cooperating combustion engine, a l

into said crank case and having intake and exhaust ports, ahead fixed in the opposite end of the cylinder and projecting thereinto and .spaced from -the walls thereof, two sleeve valves telescoped one withirithe other for controlling the ports laforesaid and f1tting over said head in the space between the same 'and the fixed cylinder, a workin .piston 'reciprocating in ,the inner one o said sleeve valves with relation to said head, both .of saidA sleeve valves being-as long as the working stroke of the-piston and projecting into the crank case, means connecting the sleeve valves with .the piston for reciprocating them, and means for supplying the crank case adjacent to the contiguous faces of the sleeve valves with lubricant during the re- `ciprocating action of the piston.

19. In an apparatus of the character decombustion engine having Aintake and exhaust ports andl embodying a crank case, a

main cylinder closed at Vits outer'end and openin into the crank case at itsinner end, two te escoped reciprocating sleeve valves telescoped in said cylinder and movable relatively or controlling the saidp'orts, a working piston reciprocating in the inner one 'of said sleeve valves relativelyljfthereto, theouter one of said sleeve valves' being arranged in working t with theface ofthe main cylinder, means operativelyl 'connecting the sleeve valve with the piston for reciprocating them, ahead fixed with relation to the and lixed against 'movement 100 with said sleeve valves and piston and projecting into and fillin he cross section ofv the inner one of. sai 'sleeve valves, said main cylinder head and sleevevalves forming a chamber into which the lsleeve valves 1,05 reciprocate, and a'connection between said i chamber and the crank case, of means in the' crank case for depositing a lubricantin said connection. f v

20. In an apparatus ofthe character de- 11( scribed, the combination of` a main cylinder of an internal combustion engine, having intake and exhaust ports, a head fixed in said rojecting therento and spaced from the wa ls thereof, two telescoped -re- 11'; ciprocatory sleevey valves telescoped with said headl in said cylinder and in the space between the latter and the head,- saidj sleeve valves having ports adaptedl to come into register as the valves -reciprocategltlieinner 121 one, of said sleeve valves ,coperating with said head for closing the ports-in As ,aid'inner r sleeve and the outer one ofsaidzsleevevalves with the inner sleeveffor con- Y trolling the ports in the said. outer sleeve), 12 a working piston reciprocating in the inner one aiasaidlsleeve valves with relationthere-v to and with relation tosaid head,'m'eans for a charge in the inner one of saidgsleeve" valves betweenl said piston and "head, Aand 1e 'them monomer means operatively connecting said sleeve valves with said piston for reciprocating with relation to the piston and to one another. 1

21..In an internal combustion engine the combination of a fixed cylinder having intake and exhaust ports, a Working piston surrounded by said cylinder and reciprocating therein, two concentric annular port controlling elements encompassing the axis of the piston within Vsaid cylinder and being relatively movable, and means connecting said elements with its. piston for moving them a distance less then its piston stro-ke forv the purpose of controlling the ports in said annular .ported elements by their relative movement,

22. In an interna-l combustion engine, the combination with a working reciprocating piston, .of a crank shaft connected thereto, a fixed cylinder co-axial'with the piston having intake and exhaust ports, two concentric cylindrical elements, one of which surrounds the other, said cylinders being relatively movable and encompassing said piston and the space in which 4the* piston reciprocates, said elements having means for the admission of a charge'of 'fluid to saidspace and the exhaust of gases therefrom, means for iii-ing a charge within saidsp'ace, and means operatively onnecting said cylindrical elements with t e crank shaft for reciprocating l. lthem relatively to each other and to the piston and-to the 'closing said exhaust and intake fixed cylinder for opening and ports and ,theexplosion chamber.

' 23.` In an internal combustion engine the f combination of a workingreciprocating pisduring strokes of the f ton, a crank shaft connected thereto, a fixed cylinder coaxial with the piston and having intake and. exhaust ports, two concentric cylindrical elements one of which surrounds the other and one of which is fixed against movement and the other of which is movable axially. with relation to the first, said elements being coaxial with said fixed cylinder and surrounded thereby, the movable on'eg of said elements encompassing the piston and a space in which the piston reciprocates and having means for the admission of a charge vof iuid to said space and the ex- -liaust of gases therefrom, the said movable one of said elements having coperative'relation with the other for preventing the escape of fluid from said space during the compressionl and firing strokes of. the piston, means for firing a charge in saidspace between and against the piston and thevxed one of said elements, means connecting the movable one of said elements with the piston for moving it over the said fixed element to close the said space against the escape of fluid therefrom the said compression and firing piston, and .then imparting urther movement .to it lrelatively to said fixed element for opening said space during the next two strokes of the piston, and port controlling means located around said movaole element and movable relatively thereto with ports registering in the fixed cylinder and being also operatively connected with the piston whereby a relative movement is created for cutting tween said space and exhaust port during the second one of the two last said strokes of the piston.

24. A n internal combustion engine comprising in combination a cylinder having inlet and exhaust ports, a head over which said cylinder moves, adapted to cover and uncover said ports, a piston in said cylinder, means operatively connected with said piston for moving said cylinder with relation to said head, and a. sleeve concentric with said cylinder, also connected with the piston and movable relatively to said cylinder and a fixed cylinder surrounding said Sleeve and having ports communicating with ports in said sleeve and movable cylinder, the relative movement of which controls the ports thereof.

25. In a four-cycle internal combustion engine the combination of a fixed cylinder having fixed intake and exhaust ports, a reciprocating piston coaxial with said cylinder, a crank shaft connected to the piston,

means for respectively controlling said' intake and exhaust ports during two strokes of the cycle and preventing fluid egress from the explosion space of the engine during the other two strokes, embodying a reciprocating cylindrical element coaxial with said fixed cylinder and piston and surrounded by the former and surrounding the latter and also surrounding the explosion space of' the engine and'having means for the admission of the fluid charge thereto and the exhaust of the gases therefrom, a reciprocating port-controlling sleeve external to the explosion space and engaging the inner face ,of the fixed cylinder, a headtelescoped with said reciprocating cylindrical element, means operatively connecting the piston with the said reciprocating cylindrical element and sleeve for movin the same relatively to `intercept communication between the explosion space and lthe said fixed ports alternately durinor one revolution of the crank off communication beshaft and to lose the explosion space against the escape of iuid therefrom during bot-h piston strokes of the next revolution of the crankshaft, and means for firingv a charge in the explosion space.

26. In aninternal combustion engine the combination of a fixed cylinder having a port, a reci roc'ating cylinder surrounded by said fixe cylinder and surrounding the explosion space of the engine and having means for fiuid admission to and exhaust from the vexplosion space, port-controlling means fixed against movement and` engaging said reciprocating cylinder V:tor controlling fluid escape therefrom`a working piston reciprocating in said reciprocating cylinder with relation thereto, means operatively connecting the reciprocating cylinder with 4the piston for reciprocating the re-f and having operative connection with the piston, and means for v firing a charge iii the reciprocatingfcylinder during the secondy one ofthe rst two said iston strokes.4

l27. In an internal com ustion engine the combination of a fixed cylinder provided with exhaust and inletv ports, a head fixed to said cylinder and projectin thereinto, and being spaced from the wal s thereof, a second cylinder slidable within the Erst said cylinder and telescoping with'said head, a piston working within the second said cylinder, a crank to which said piston is connected, a sleeve surrounding the second said.

cylinder, and ,l means operatively 'connecting the second said cylinder and sleeve with said crank for reciprocating them relatively at lesser frequency thanl the piston and opening and closing the said ports.

28. In an internal combustion engine the combination of acylinder havinga` ort, a piston, a second cylinder telescope fwithy the first said cylinder and arranged concentrically with said piston for at times controllin said port, a head in the .first said cylin er andl with which head the lsecond said cylinder is telescoped and moves with reference thereto, packing rings interosed between saidhead and second cyliner, means-for igniting a charge between the head and thepiston, a crank connected with the piston, means operatively related to the' piston for moving the second said cylinder simultaneously with the piston for at times controlling said port, and a port controlling element movable by the crank relatively'toI said second cylinder and coo erating with the reciprocating cylinder a so for controlling the said port.k In an internal combustion v'engine vthe* combination of` a fixed cylinder `having' vintake and exhaust ports, areciprocatingcyly said fixe Acylinder and surrounding thefexplosion-lspace of the engine and having Iportsin. itsl sides for adinitting fluid to and exhausting Huid from the explosion space, internal port-control#A lling means fixed against movement andr engagging said 'reciprocating cylinder, aworking piston reciprocating coaxiallykwith relation to said reciprocating cylinder and surrounded thereby, means operatively connectingthe reciprocating c linder with the piston for reciprocating te reciprocating cylinder with the said ports thereof in lapped relation with said port-controlling means during two successive piston strokes and out of lapped relation therewith during the twosucceeding strokes of the piston, and means :for firing a charge in the explosion space duringthe second one of the first two said piston' strokes, and an aniiularl port-controlling element movable relatively to and coaxial Vwith, the said reciprocatin cylinder-aridL connected with the piston w ereby the reciprocating cylin- ,de'r and annular port-controlling element are moved relatively for controlling the ports thereof. l'j' l30. ln an internal combustion engine the combination of a fixed cylinder having intake and exhaust ports, a reciprocating cylinder surrounded by said xed cylinder and `surrounding the explosion space of the engineand havin means for fluid admission to and exhaust cluding an exhaust port movable therewith, port-controlling means internal to said reciprocating cylinder and engaging therewith for controllingv said exhaust port thereof, a working piston reciprocating coaxially with relation to said reciprocating cylinder and surrounded thereby, means operatively connecting the reciprocating cylinderwith the piston for reciprocating the reciprocating cylinder with the said exhaust portthereof in lapped relation with said port-controllin means during two successive piston 'stro es and out of lapped relation therewith during the two succeeding strokeso the piston, means for controispace from said intake port of the xed cylinder embodying a reciprocating sleeve, and means for firing a charge in the explosion said piston strokes.

31. A four`cycle`internal combustion engine having in combination a fixed offline der rovided withl a closed end fixed with relation thereto, said cylinder havin romlthe explosiongchamber to said port -trolling elements to cut on comme om the explosion space inling the admission of Huid tothe explosion ort, means for opening communication i space during the second one of the iirst two embodying two relatively movable cyin between the said space and the Y :zii

l a ciprocating cylind 50 saidreciprocatin cylin e inattesi' during one of the 'inward piston strokes and `o estabhsh communication-between said port and space during the next inward piston stroke .of the same cycle.

32. In an internal combustion engine, the combination of a fixed cylinder having intake and exhaust ports, a reciprocating cyl- 1nder surrounded by said fixed cylinder 'and surrounding the explosion space of the engine and havlng means for 'tiuid admission haustiport of the lixed'cylinder, a head inf ternal to said reciprocating cylinder and engaglng therewith, a working piston reciproeating coaxially with relation to said reciprocating cylinder, means connecting the reciprocating cylinder with the piston for restrokes and out'of lapped relation therewith during the two succeeding strokes' of the g5 piston, a ortcontrolling annular valve external to t e explosion space and internal to said fixed cylinder and engaging theinner face thereof and of the fixed cylinder alternately during the second two said piston strokes, and means for firing a charge in the 4explosion space during one bf the rsttwo said piston strokes.

33.111 aninternal ,combustion engine the combination of a fixed cylinder having intake and exhaust ports, a crank shaft, a reciprocating piston vconnected therewith, a reer surrounded by the fixed cyhnder and surrounding the space of the engine and containing and guiding theA piston and in which v the piston Yreciprocates relatively thereto, a head telescoped with said vreciprocating cylinder and xed against'movement therewith and with thegp'iston, means forexplodin acharge in said reciprocating cylinder etween and against said head and (pistoni,l thewall of er bein apertured ischarge'of.-

for induction oft e charge and the exhaust fand the apertured area thereof bein adapted tomove over andv awayfrom said ead, means vconnectuner, the l piston; with saidreciprocating cylinder `fOr;` ,IBt'procatin cylinder .rwith .thefsal the reciprocatin apertured area t ereoif lapped ,relation to said `head 'during 'two successv f' Aiston thereto and contemporaneous movement offth'efipsfon and said aperturedarea is-ioni; (if-lapped yrelation a with the sind haa-daring one Asana 'of ne Amunication between the explosion space and piston, and controlling communication being fixed intake and exhaust ports', a pis- 75 avcrank shaft connected thereto, means ring a charge in said explosion space and means for respectively controlling. Huid egress from the explosion space and comsald fixed. ports embodying two cylindrical telescoped elements, one of which encompasses the explosion space and reciprocates contemporaneously with the piston and with relation to the other of said elements which latter element is fixed against movement,` one of said elements having its wall aper- `tured throughout a. portionof its area for Huid admission to and exhaust from the explosion space andboth of said elements be 99 ing concentric with said fixed cylinder, a packing interposed between the contiguous faces of said elements ,and `secured to one of them for coveringthe said apertured area ofthe other one during one inward stroke of the piston and the succeeding outward stroke, said packing being substantially equal in width to the travel of said reciprocating element during the two said strokes of the piston, means connecting the piston with the said reciprocating element for moving it until said apertured area and packing are in overlapped relation substantially throughout the revolution of the crank shaft including said two piston strokes and out of such relation substantially throughout the. immediately preceding revolution of the crank shaft, the said means for controlling communication between the explosion space and fixed parts also including a reciprocat- 1w ing port-controlling sleeve surrounding said reciprocating element and connected with the piston for movement with relation to said reciprocating element and for alternately cuttingthe said intake and exhaust ports ofi' from communication with the ex' plosion space during the second said revolution of the crank-shaft. 35.v In an internal combustion englne the eombinationofa piston, a crank-shaft connected thereto, a fixed cylinder having fixed intakefand exhaust'.VA ports, a. head arranged in said cylinder, reciprocating port-controle` 1. ling means embodying two cylindrical telescoped elements coaxial with the piston and 1 35 telescoped with said'A heads. and surroundedA` by .said fixedcylinderysaidf reciprocating. y port-control1ing meanslhaving ports coperating with each othery to open andclose communication between the explosion space,n

and said fixed ports alternately during one revolution of the crank shaft, said cylindrical elements cooperating interiorly with the said head, and means for firing ya charge in the explosion space during the latter said revolution.

36. In an internal combustion engine, the combination of a iixed cylinder having ixed intake and exhaust port-s, means for controlling iuid ingress to and egress from the explosion space embodying'- a cylindrical headV fixed against movement with relation to the. said fixed cylinder, and projecting lthereinto and spaced from the walls thereof, and a reciprocating cylinder surrounded by said fixed cylinder and surrounding the explosion space of the engine and having means for fiuid induction to and exhaust from the explosion space, said reciprocating cylinder being telescoped over said head whereby the explosion space is opened and closed as the reciprocating cylinder moves, a port controlling sleeve around said reciprocating cylinder engaging with the inner face of the fixed cylinder and cooperating with the reciprocatinrr cylinder for controlling the inlet and exiaust -from said iixed ports, a working piston reciprocating in said reciprocating cylinder with relation thereto, a crank-shaft connected to said piston, means operatively1 connected with the piston for moving the reciprocating cylinder and said port emit-rolling sleeve with relation to the head and fixed cylinder in lconcert with the movement. of the piston for opening communication'between the explosion space and the said fixed intake port during an outward piston stroke, then lapping said means foil {iuid induction and exhaust of the reciprocating c vlinder `over the said head to close the explosion space during the two succeeding piston strokes, and tinally opening communication between the explosion space and said fixed exhaust portl during the piston stroke immediately7 following said two succeeding strokes, and means for exploding a charge between said head and piston.

37. In an internal combustion engine, the combination with a xed cylinder having intake and exhaust ports, a cylindrical head projecting intosaid cylinder and-space from the walls thereof and forming an annular explosion space therewith, two concentric elatively moving cylindrical port-controlling elements telescoped over said head, said port-controlling elements inclosing the explosion space of the engine, both of said elements having intake and'exhaust ports adapted to communicate during` the relative movement of said elements for controlling the intake of fluid and the exhaust of gases from the explosion space, a working piston reciprocating axially with relation to said elements and surrounded thereby, speed reducing means posiin said cylinder and' tivelyV connecting the piston with said elements for reciprocating them with relation to each other and with relation to the head and cylinder, and means for firing a charge in said explosion space. l v

. '38. In an internal combustion engine, the combination of two ported cylindrical sleeve valves surrounding a reciprocating .working piston with intervening actuating mechanism connecting said valves with said piston for imparting to said sleeve valves a motion of'lesser frequency than that o f the piston for opening and closing said ports in the manner required for sealing the 'explosion chamber during approximately one4 full revolution of the crank shaftand alternately opening and closing the exhaust and intake ports during the succeeding revolution thereof.

39. In an internal combustion engine, the combination of two ported cylindrical sleeve valves surrounding aireciprocating working piston and a -main cylinder inclosi'ng said valves and having one crank case and the other end closed by a head lixed against 'movement relatively to said" main cylinder and projecting thereinto, actuating mechanism for the valves and for the said piston whereby the mechanism for the valve imparts a motion of lesser frequency than that of the working piston.

4 0. In an internal combustion engine, the combination of two ported sleeve valves surrounded by a fixed cylinder or casing, an inwardly projecting head xed against movement and opposite to a. working piston which reciprocates ,sleeve valves, together with a mechanism connecting said sleeve valves with said piston, imparting to the former a movement of less frequency than that of said piston, causing theports in the inner of said valves to be uncovered by said inwardly projecting head during two full successive strokes of the piston, and covered during the two subsequent successive strokes.

41. In an apparatus of the character described, the combination of a main cylinder of an internal combustion engine, having intake and exhaust ports, a head fixed in said cylinder and projecting thereinto and spaced from the walls thereof,'two telescoped reciprocatory sleeve valves telescoped with said head in said cylinder and in the space between the latter and the said head, said sleeve valves having ports adapted to go into register as the valves reciprocate, the inner one of said sleeve valves coperating with said head for sealing'the explosion chamber during the compression and tiring strokes of the engine, and the outer of said sleeve valves cooperating with said inner sleeve for opening and closing the exhaust end opening into a in the inner one of said.'

weitem the next stroke', and a working piston reciprocating in the inner one 'of the said sleeve valyes with relation thereto, and with relation to said head, means for firing the .chargein the inner one of said sleeve valves between said piston and said head, and means operatively connecting said sleeve valves with said piston for moving them with relation to said piston at a lesser frequency than the same and to one another.

42.111 an internal combustion engine, the combination with a fixed cylinder having intake and exhaust ports, a working piston surrounded by said cylinder and reciproeating therein, two concentric annular port controlling elements encompassing the piston within the said cylinder and being relatively movable, for controlling the ports, and means connecting the said elements with' the piston for moving them a distance less and at a lesser frequency than the piston stroke.

43. In an internal combustion engine, the combination with a fixed cylinder of sleeve valves movable therein and relatively to one another, a piston operable in the inner one of said sleeve valves, a head closing the combustion engineA of said cylinder, and projecting thereinto, and means for operating said sleeve valves from said piston, whereby the inner one of said valves 'coperates with said head for sealing the explosion chamber during the compression and ring strokes of the engine, and the outer valve controls the distribution of gases as required by four stroke cycle engine.

In testimony whereof I have signed my name to this specification, in the presence Aof two subscribing witnesses,l on this 31st day of May A. D. 1906.

CHARLES Y. KNIGHT. Witnesses:

FRANCIS A. HOPKINS, CHARLES H. Snam. 

